CN106304175B - Pilot frequency measurement method in cluster system - Google Patents
Pilot frequency measurement method in cluster system Download PDFInfo
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- CN106304175B CN106304175B CN201510314132.6A CN201510314132A CN106304175B CN 106304175 B CN106304175 B CN 106304175B CN 201510314132 A CN201510314132 A CN 201510314132A CN 106304175 B CN106304175 B CN 106304175B
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Abstract
The application discloses a pilot frequency measurement method in a cluster system, which comprises the following steps: when the cluster user equipment UE is accessed to a network, extracting configuration information of cluster pilot frequency measurement from a received system message and storing the configuration information; and after the cluster UE joins the cluster broadcast group, the cluster UE performs pilot frequency measurement according to the stored configuration information of the cluster pilot frequency measurement. By applying the method and the device, the measurement configuration of the user can be simplified, and the different frequency measurement and the cluster paging can be further ensured not to be influenced by each other.
Description
Technical Field
The present application relates to a channel measurement technique in a communication system, and in particular, to a pilot frequency measurement method in a trunking system.
Background
When the UE moves in an environment covered by an inter-frequency neighboring cell in LTE, signal quality measurement (i.e., inter-frequency measurement) needs to be performed, so that a suitable cell can be selected for service. In LTE, when the UE performs the above-mentioned inter-frequency measurement, it cannot perform other normal services, and this time is called a measurement interval.
In the current system, when a user performs a normal service, it is assumed that inter-frequency measurement is caused by a change in signal quality, and then, if a trunking broadcast communication is initiated in a trunking communication group to which the user belongs, a network side needs to coordinate measurement intervals of all users in the trunking broadcast group, so as to ensure that data of the trunking broadcast group does not fall within a measurement interval period of the user performing the service.
In this case, the current practice is that the network side configures fixed measurement interval information for the trunking broadcast group, and when a user who has initiated an inter-frequency measurement passively enters the trunking broadcast group for performing a service while doing a service, the network side needs to use the configuration value to normalize the measurement intervals of all users, so as to ensure that the measurement interval information of the users belonging to the current trunking broadcast group is consistent. The specific method is to send reconfiguration messages to all terminal users through an air interface to ensure that the starting time and the ending time of the measurement interval are consistent.
The unified configuration method has the following problems:
1. when the number of users belonging to the trunking broadcast group is large enough, the number of air interface configuration messages for all users is large, air interface resources are occupied, and access delay of new users is affected. Meanwhile, the application scenes of the cluster broadcast group are frequent, so that the probability of the problem is extremely high in the pilot frequency networking scene.
2. When the current system is designed and user pilot frequency measurement is configured, the avoidance of cluster paging occasion is not considered, so that a user loses cluster paging and cannot correctly join an activated group, and the group service is abnormal.
Disclosure of Invention
The application provides a pilot frequency measurement method in a cluster system, which can simplify measurement configuration for users and further ensure that pilot frequency measurement and cluster paging do not influence each other.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a pilot frequency measurement method in a cluster system comprises the following steps:
when the cluster user equipment UE is accessed to a network, extracting configuration information of cluster pilot frequency measurement from a received system message and storing the configuration information;
and after the cluster UE joins the cluster broadcast group, the cluster UE performs pilot frequency measurement according to the stored configuration information of the cluster pilot frequency measurement.
Preferably, the configuration information of the cluster pilot frequency measurement ensures that the measurement time of the cluster pilot frequency measurement does not coincide with a paging subframe.
Preferably, before the trunking UE joins the trunking broadcast group to perform the voice service, the method further includes: and the cluster UE performs pilot frequency measurement according to RRC connection reconfiguration.
Preferably, the method further comprises: and the cluster UE receives the updated configuration information of the cluster pilot frequency measurement in the system message, updates the stored configuration information of the cluster pilot frequency measurement, and performs pilot frequency measurement according to the updated configuration information after joining the cluster broadcasting group to perform voice service.
A pilot frequency measurement method in a cluster system comprises the following steps:
after activating the cell, the base station determines configuration information of cluster pilot frequency measurement, and carries the determined configuration information of the cluster pilot frequency measurement in a system message to be configured to the cluster user equipment UE through an air interface.
Preferably, the determined measurement time of the trunked pilot frequency measurement does not coincide with the trunked paging subframe.
Preferably, the method further comprises: and the base station updates the configuration information of the cluster pilot frequency measurement, carries the updated configuration information of the cluster pilot frequency measurement in a system message and configures the system message to the cluster UE through an air interface.
Preferably, the method further comprises: when the base station initiates a trunking broadcast group service, if finding that the UE belonging to the trunking broadcast group starts pilot frequency measurement, the base station uses information consistent with the measurement interval in the configuration information to allocate time-frequency resources for the trunking broadcast group according to the configuration information of the trunking pilot frequency measurement.
Preferably, the method further comprises: for the cluster UE which does not join the cluster broadcast group, after receiving the measurement report of the corresponding cluster UE, the base station sends the pilot frequency measurement control to the cluster UE through RRC connection reconfiguration, so that the pilot frequency measurement time is not overlapped with the cluster paging subframe, and the measurement time is hashed, and the pilot frequency measurement time of all the UE which does not join the cluster broadcast group is not configured together.
According to the technical scheme, the base station determines the configuration information of the cluster pilot frequency measurement and carries the configuration information in the system message to be configured to the cluster UE; and after the cluster UE joins the cluster broadcast group to perform voice service, the cluster UE performs pilot frequency measurement according to the stored configuration information of the cluster pilot frequency measurement. By the mode, the configuration information of cluster pilot frequency measurement is configured through the system message, the cluster UE is prevented from being notified one by one, and air interface resources of the system are greatly saved.
Drawings
Fig. 1 is a schematic basic flow chart of an inter-frequency measurement method in the present application;
fig. 2 is a schematic view of measurement time configuration of cluster inter-frequency measurement.
Detailed Description
For the purpose of making the objects, technical means and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.
At present, when the cluster broadcast group UE performs the inter-frequency measurement, the period and the start time of the measurement interval are fixed, and based on this, in the inter-frequency measurement method provided in the present application, the measurement time information for measuring the inter-frequency measurement is broadcast in a system message manner, so as to save system resources.
Fig. 1 is a schematic basic flow chart of the pilot frequency measurement method in the present application. In the pilot frequency measurement method, the two sides of the terminal and the base station are processed, and the two sides are matched with each other to complete pilot frequency measurement. For convenience of description, the terminal and base station side processes are described together in fig. 1 below. As shown in fig. 1, the method includes:
step 101, after a base station activates a cell, determining configuration information of cluster pilot frequency measurement.
When determining the configuration information of cluster pilot frequency measurement, the pilot frequency measurement interval of the cluster UE is restricted not to coincide with the cluster paging subframe, thereby ensuring that the UE can receive the paging message of the joining group and can keep the pilot frequency measurement period aligned with the network side.
Specifically, the subframes included from the configured inter-frequency measurement starting subframe to the inter-frequency measurement ending subframe cannot coincide with the trunking paging subframe. As a simple example, as shown in fig. 2, it is assumed that Gap _ Duration (i.e. Duration of inter-frequency measurement) is fixedly set to 6 subframes, SubFrame represents an inter-frequency measurement start SubFrame, and SFN represents an inter-frequency measurement frame number, and here, it is exemplified that the trunking paging SubFrame defaults to 0.
In fig. 2, it is assumed that the frame number (i.e. SFN) where the inter-frequency measurement is located is configured to be 40, and the SubFrame number (i.e. SubFrame) is 6, such configuration will cause the measurement time to coincide with the trunking paging SubFrame, and therefore cannot be configured, and the inter-frequency measurement frame number (i.e. SFN) needs to be configured to be 41, and the SubFrame number (i.e. SubFrame) needs to be 1, so as to skip the trunking paging SubFrame.
And 102, the base station carries the determined configuration information of the cluster pilot frequency measurement in a system message and sends the configuration information out through an air interface.
In order to solve the problem of large resource occupation caused by sending the configuration information of the cluster pilot frequency measurement to the cluster UE one by one, the configuration information of the cluster pilot frequency measurement is carried in the system message to be sent, so that the configuration information does not need to be sent to each UE, and the system resource occupied by sending the configuration information is greatly reduced.
Step 103, when the cluster UE accesses the network, the cluster UE extracts and stores the configuration information of the cluster pilot frequency measurement from the received system message.
When a cluster terminal user accesses the network, acquiring configuration information about cluster pilot frequency measurement in an appointed system message, storing the acquired configuration information, and performing pilot frequency measurement according to the configuration information after the cluster terminal user joins a cluster broadcast group.
Before the cluster UE is added into the cluster broadcast group after accessing the network, if the pilot frequency measurement is needed, executing steps 104-105:
step 104, the UE sends a measurement report to the base station.
And 105, the base station determines that the pilot frequency measurement needs to be carried out according to the measurement report, and issues pilot frequency measurement control to the UE through RRC connection reconfiguration.
Because the UE does not join the trunking broadcast group, the configuration of trunking pilot frequency measurement is not adopted, and the base station still adopts RRC connection reconfiguration to send pilot frequency measurement control to the UE. When the pilot frequency measurement control is issued, the configured pilot frequency measurement time is not overlapped with the trunking paging subframe, so that the UE can normally receive paging of a trunking system, and meanwhile, the pilot frequency measurement time of different UEs is hashed, so that the pilot frequency measurement time of all UEs which are not added into a trunking broadcast group is not configured together.
When the base station wants to perform the service of the trunking broadcast group, it needs to allocate resources to the trunking broadcast group, and may perform the following steps according to step 106:
step 106, when the base station initiates the service of the trunking broadcast group, if finding that the UE belonging to the trunking broadcast group starts the pilot frequency measurement, the base station allocates the time frequency resource for the trunking broadcast group by using the information consistent with the measurement interval in the configuration information according to the configuration information of the trunking pilot frequency measurement.
In order to ensure the consistency of information at the network side and the terminal side, when time-frequency resource configuration is performed on a trunking broadcast group, if pilot frequency measurement is performed on the UE belonging to the trunking broadcast group, the base station needs to perform resource allocation by using information consistent with the measurement interval of the trunking pilot frequency measurement.
Meanwhile, after the trunking UE joins the trunking broadcast group, when the pilot frequency measurement control needs to be performed, step 107 is executed:
step 107, the cluster UE performs pilot frequency measurement according to the configuration information of the cluster pilot frequency measurement stored in step 103.
In this step, after the trunking broadcast group is added, the trunking UE replaces the original pilot frequency measurement configuration with the stored configuration information of the trunking pilot frequency measurement to keep synchronization with the network side, and performs pilot frequency measurement according to the configuration information of the trunking pilot frequency measurement.
So far, the inter-frequency measurement process in the present application is finished. In the above flow, steps 101, 102 and 106 constitute a configuration method of cluster pilot frequency measurement of the base station, and steps 103 and 107 constitute a cluster pilot frequency measurement method of the UE.
In addition, in practical application, the update of the cluster pilot frequency measurement configuration information may also be involved, specifically, when the corresponding information update is performed, the base station may broadcast the updated cluster pilot frequency measurement configuration information through a system message, the UE receives the system message, updates the cluster pilot frequency measurement configuration information stored by the UE itself, and performs pilot frequency measurement using the updated cluster pilot frequency measurement configuration information after the UE joins the cluster broadcast group, so as to ensure that the information on the network side and the terminal side is consistent.
Through the processing of the application, the configuration information of the cluster pilot frequency measurement is fixedly configured, so that the occupation of the air interface resources by the centralized reconfiguration in a traffic scene is effectively relieved, the impact of the centralized reconfiguration in the traffic scene on the CPU resources of the product is effectively relieved, the realization process of the product can be simplified, and the complexity of the product is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A method for inter-frequency measurement in a cluster system is characterized by comprising the following steps:
when connected cluster User Equipment (UE) is accessed to a network, extracting configuration information of cluster pilot frequency measurement from received system information and storing the configuration information;
after the cluster UE joins the cluster broadcast group, the cluster UE performs pilot frequency measurement according to the stored configuration information of the cluster pilot frequency measurement;
and the configuration information of the cluster pilot frequency measurement ensures that the measurement time of the cluster pilot frequency measurement is not overlapped with a paging subframe.
2. The method of claim 1, wherein before the clustered UEs join a clustered broadcast group for voice service, the method further comprises: and the cluster UE performs pilot frequency measurement according to RRC connection reconfiguration.
3. The method of claim 1, further comprising: and the cluster UE receives the updated configuration information of the cluster pilot frequency measurement in the system message, updates the stored configuration information of the cluster pilot frequency measurement, and performs pilot frequency measurement according to the updated configuration information after joining the cluster broadcasting group to perform voice service.
4. A method for inter-frequency measurement in a cluster system is characterized by comprising the following steps:
after a base station activates a cell, determining configuration information of cluster pilot frequency measurement, and carrying the determined configuration information of the cluster pilot frequency measurement in a system message to be configured to cluster User Equipment (UE) through an air interface;
and the determined measurement time of the cluster pilot frequency measurement is not overlapped with the cluster paging subframe.
5. The method of claim 4, further comprising: and the base station updates the configuration information of the cluster pilot frequency measurement, carries the updated configuration information of the cluster pilot frequency measurement in a system message and configures the system message to the cluster UE through an air interface.
6. The method of claim 4, further comprising: when the base station initiates a trunking broadcast group service, if finding that the UE belonging to the trunking broadcast group starts pilot frequency measurement, the base station uses information consistent with the measurement interval in the configuration information to allocate time-frequency resources for the trunking broadcast group according to the configuration information of the trunking pilot frequency measurement.
7. The method of claim 4, further comprising: for the cluster UE which does not join the cluster broadcast group, after receiving the measurement report of the corresponding cluster UE, the base station sends the pilot frequency measurement control to the cluster UE through RRC connection reconfiguration, so that the pilot frequency measurement time is not overlapped with the cluster paging subframe, and the measurement time is hashed, and the pilot frequency measurement time of all the UE which does not join the cluster broadcast group is not configured together.
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| CN110730497B (en) * | 2018-07-16 | 2021-10-26 | 普天信息技术有限公司 | Method for pilot frequency measurement gap synchronization control and eNodeB base station |
| CN112788547B (en) * | 2019-11-05 | 2022-05-13 | 成都鼎桥通信技术有限公司 | Method and equipment for enabling measurement gap parameters to take effect in broadband trunking communication |
| CN113316094B (en) * | 2020-02-26 | 2023-03-31 | 成都鼎桥通信技术有限公司 | Method and system for sending cluster group short data |
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